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1. What important process happens in the netlike structure labeled A?
A. Nitrogen and oxygen are exchanged.
B. Carbon dioxide and oxygen are exchanged.
C. Nitrogen and carbon dioxide remain constant.
D. Carbon dioxide and oxygen diffuse into the blood.
2. What structure of the Respiratory System is labeled B in the diagram?
A. Alveolus
B. Bronchi
C. Bronchiole
D. Pharynx
3. Why is the lung considered as the primary organ of the respiratory system?
A. Because it is the largest organ of the system.
B. Because it has two parts: the right and left lungs.
C. Because it is located near the middle of the chest cavity.
D. Because it contains the alveoli that is responsible for gas exchange.
4. Which of the following statements about the human respiratory system is
false?
A. The bronchioles branch into bronchi.
B. Alveolar ducts connect to alveolar sacs.
C. When we breathe in, air travels from the pharynx to the trachea.
D. Gas exchange between the lungs and blood takes place in the alveolus.
2
CO Q1 Science 9 Mod
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Sagot :

HelperWarsidn

Answer:

1. B. Carbon dioxide and oxygen are exchanged.

2. A. Alveolus

3. D. Because it contains the alveoli that is responsible for gas exchange.

4. A. The bronchioles branch into bronchi.

Explanation:

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